US 4,196,523 AGranted

Method of centering hollow cylindrical workpiece

AssigneesMitsubishi Jukogyo Kabushiki Kaisha, Sumitomo Metal Industries, Ltd.

InventorsKazuto Nagata, Hiroaki Himeno, Hironari Okitomo, Hiroshi Hatakeyama, Kazunori Tsuruta, Itsuo Murata, Keiichi Kobayashi, Shigetaka Hosaka, Katsumasa Hironaka, Osamu Torii

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Abstract

A method of centering a hollow cylindrical piece of work comprises measuring the outside and inside diameters and contours of the work by means of outside- and inside-diameter-measuring instruments relative to the common centerline of the instruments taken as the virtual center of the work, inputting the measured values with corrections made for any deflection of the work and for any error arising from the instruments, to an electronic computer, and allowing the computer to memorize the information and operate to find the real center of the hollow cylindrical work on the basis of the stored information, whereby the location of the real center and machining allowances necessary for obtaining a product finished to the desired contours can be be computed.

Claims1

Dependent claims

A method for centering a hollow cylindrical workpiece having a longitudinal dimension comprising the steps of;

selecting a plurality of cross-sectional planes extending generally perpendicular to said longitudinal dimension of said workpiece at spaced apart locations therealong;
utilizing outside and inside diameter measuring instruments to measure the outside and inside diameters and contours of said hollow cylindrical workpiece relative to a center line of said instruments taken as a virtual center of the workpiece, said measurements being taken for each of said selected plurality of cross-sectional planes;
effecting corrections in said measurements to compensate for deflection of said workpiece and for error arising from the instruments themselves;
compiling said measurements as stored information;
and calculating on the basis of said stored information the real center of said hollow cylindrical workpiece;
whereby the location of said real center and machining allowances necessary for obtaining a product finished to desired contours can be computed.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/870,718Filed 19 Jan 1978
Priority: JP 52-122937 Feb 1977
Granted: 8 Apr 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G01B 21/24
For measuring angles or tapers; for testing the alignment of axes: for testing alignment of axes
G05B 19/402
Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to…
G05B 2219/49184
Nc machine tool, till multiple: compensation for bending of workpiece, flexible workpiece
G05B 2219/50055
Machine tool, machine tool null till machine tool work handling: make hollow worpiece with uniform wall thickness